Method and device for updating link state information
A technology of link status information and status information, applied in the field of communication, can solve problems such as excessive memory processing resources and bandwidth, occupation of network equipment, etc.
Active Publication Date: 2021-01-26
HANGZHOU DPTECH TECH
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Problems solved by technology
With the expansion of IS-IS network scale, the LSP generated by network devices needs to carry more link state information, and the number of LSP packets in IS-IS network also increases sharply, which leads to the occupation of network devices by LSP packets. Excessive memory processing resources and bandwidth
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[0048] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the existing technical solutions and the present invention in conjunction with the accompanying drawings. The technical solutions in the embodiments of the invention are described in further detail.
[0049] In the LSP message, there is a remaining lifetime (remaining lifetime) field, and the remaining lifetime in this field indicates the effective time of the link state information in the LSP message in the IS-IS network. The remaining lifetime of the link state information of each neighbor device stored by the network device in the local LSDB (Link State DataBase, link state database) will gradually decrease. When the remaining lifetime of any link state information becomes...
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The present application provides a method and device for updating link state information, the method comprising: generating a reference LSP message for local link state information; wherein, the reference LSP message does not carry the link state information; The reference LSP message is sent to a neighbor device, so that the neighbor device checks whether it needs to update its own link state information according to the LSP message, and returns a link state information request message when it is determined that an update is required; The neighbor device that sends the link state information request message sends an LSP message carrying the link state information, so that the neighbor device updates its own link state information. In this application, since the reference LSP message sent by the network device does not carry link state information, the consumption of network bandwidth is greatly reduced, and the memory processing resources consumed by neighbor devices when receiving the LSP message are also reduced.
Description
technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for updating link state information. Background technique [0002] IS-IS (Intermediate system to intermediate system, intermediate system to intermediate system) protocol is a widely used routing protocol. Network devices running the IS-IS protocol generate LSP (Link StatePDUs, link state messages) messages to publish their own link state information, where the link state information includes topology connection status and routing information, and receives other network The LSP message issued by the device is used to obtain the topology connection status and routing information of other network devices, so as to complete the exchange of link state information. With the expansion of IS-IS network scale, the LSP generated by network devices needs to carry more link state information, and the number of LSP packets in IS-IS network also inc...
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IPC IPC(8): H04L12/751H04L12/759H04L45/02H04L45/28
CPCH04L45/02H04L45/028
Inventor 王朝
Owner HANGZHOU DPTECH TECH